title: Wall perimetry in chiropractic.
abstract: BACKGROUND
  Wall perimetry is a method of examination that led to the initial appreciation of the "tunnel vision information." The visual field loss that wall perimetry indicates generally defines the overall characteristics of the dysfunction associated with 'tunnel vision.' Wall perimetry is an inexpensive, yet sensitive, preliminary screening test for perception abnormality in the outermost periphery of vision.
  
  
  OBJECTIVE
  To describe wall perimetry. The term "wall perimetry" denotes a simple preliminary method of examining the visual fields of chiropractic patients.
  
  
  CONCLUSIONS
  The test is described with reference to photographs. The patient stands 1 m from the corner of a room and is instructed to look directly at the junction of the walls, with the head remaining still and gaze fixed. Standing behind the patient, the examiner projects a target of light onto the wall and moves it until it is seen by the subject.
  
  
  CONCLUSIONS
  Chiropractors are encouraged to test appropriate patients by wall perimetry before spinal manipulation therapy. On the basis of existing experience, detection of patients with visual field loss is to be expected. From that point, formal examination of the visual fields using kinetic or static perimetry apparatus is recommended to further verify the "tunnel vision" discovery.
authors.affiliation: Macquarie University, School of Chiropractic, Sydney, Australia.
authors.forename: D
authors.initials: D
authors.lastname: Stephens
authors.forename: D
authors.initials: D
authors.lastname: Bilton
authors.forename: H
authors.initials: H
authors.lastname: Pollard
authors.forename: F
authors.initials: F
authors.lastname: Gorman
mesh_terms: D002684:Chiropractic / Q000379:methods*; D006801:Humans; D013131:Spine; D014786:Vision Disorders / Q000175:diagnosis* / Q000628:therapy*; D058609:Visual Field Tests / Q000379:methods*; D014794:Visual Fields